[release/5.0-preview4] Revert processing bundles in framework (#35679)v5.0.0-preview.4.20251.6

This commit reverts:
Revert "Single-File: Process bundles in the framework (#34274)"
This reverts commit 78b303df8fbb242985d049a277d0d199cafd51b5.

Revert "Single-File Bundler: Add a FileSize test (#35149)"
This reverts commit 779588a509b81d909ac5d496c172949ec1f1ddcc.

*Customer Scenario*

Publishing apps as a self-contained single-file doesn't work as expected.

* Publish needs to generate hostpolicy and hostfxr separate from the single file bundle
* Cross-platform publishing is incorrect

*Problem*

Since Static-apphost is not yet ready, processing bundle content in hostpolicy means that  hostpolicy and hostfxr DLLs need to be separate from the bundle. This causes self-contained single-file apps to not be a "single file" temporarily. 

The change also requires supporting changes from the SDK, to publish hostfxr and hostpolicy as separate files, and to invoke HostModel library with arguments that facilitate cross-platform publishing.

*Solution*

To solve these, problem, this change reverts:

Revert "Single-File: Process bundles in the framework (#34274)" commit 78b303df8fbb242985d049a277d0d199cafd51b5.

and a dependent test-only change:

Revert "Single-File Bundler: Add a FileSize test (#35149)" commit 779588a509b81d909ac5d496c172949ec1f1ddcc.

*Risk*

Medium
The change is contained to only host components: apphost, hostpolicy, and hostfxr.
However, the change is big, and needs testing in runtime and SDK repos.

*Testing*

Manually tested the SDK by inserting apphost, hostfxr, hostpolicy, and hostmodel library from this build into the `dotnet/packs` preview-4 SDK from https://github.com/dotnet/sdk/pull/11518 build.

Verified that:
* Singlefile apps can be published and run OK for  { Windows, Linux, Osx } x {netcoreapp3.0, netcoreapp3.1, netcoreapp5.0} 
* Cross-targeting builds of single-file apps build and run OK (ex: built on Windos, run on Mac).

1 files changed, 0 insertions, 91 deletions

diff --git a/src/installer/corehost/cli/bundle/info.h b/src/installer/corehost/cli/bundle/info.h
deleted file mode 100644
index 0f3db559fc2..00000000000
--- a/src/installer/corehost/cli/bundle/info.h
+++ /dev/null
@@ -1,91 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-#ifndef __INFO_H_
-#define __INFO_H_
-
-#include "error_codes.h"
-#include "header.h"
-
-// bundle::info supports:
-// * API for identification of a single-file app bundle, and
-// * Minimal probing and mapping functionality only for the app.runtimeconfig.json and app.deps.json files.
-// bundle::info is used by HostFxr to read the above config files.
-
-namespace bundle
-{
-    struct info_t
-    {
-        struct config_t
-        {
-            config_t()
-            : m_location(nullptr) {}
-
-            config_t(const config_t& config)
-            {
-                m_path = config.m_path;
-                m_location = config.m_location;
-            }
-
-            config_t(const pal::string_t& path, const location_t *location=nullptr)
-            {
-                m_path = path;
-                m_location = location;
-            }
-
-            bool matches(const pal::string_t& path) const
-            {
-                return m_location->is_valid() && path.compare(m_path) == 0;
-            }
-
-            static bool probe(const pal::string_t& path)
-            {
-                return is_single_file_bundle() && 
-                       (the_app->m_deps_json.matches(path) || the_app->m_runtimeconfig_json.matches(path));
-            }
-
-            void set_location(const location_t* location)
-            {
-                m_location = location;
-            }
-
-            static char* map(const pal::string_t& path, const location_t* &location);
-            static void unmap(const char* addr, const location_t* location);
-
-        private:
-            pal::string_t m_path;
-            const location_t *m_location;
-        };
-
-        static StatusCode process_bundle(const pal::char_t* bundle_path, const pal::char_t *app_path, int64_t header_offset);
-        static bool is_single_file_bundle() { return the_app != nullptr; }
-
-        bool is_netcoreapp3_compat_mode() const { return m_header.is_netcoreapp3_compat_mode(); }
-        const pal::string_t& base_path() const { return m_base_path; }
-        int64_t header_offset() const { return m_header_offset; }
-
-        // Global single-file info object
-        static const info_t* the_app;
-
-    protected:
-          info_t(const pal::char_t* bundle_path,
-                 const pal::char_t* app_path,
-                 int64_t header_offset);
-
-        const char* map_bundle();
-        void unmap_bundle(const char* addr) const;
-
-        pal::string_t m_bundle_path;
-        pal::string_t m_base_path;
-        size_t m_bundle_size;
-        int64_t m_header_offset;
-        header_t m_header;
-        config_t m_deps_json;
-        config_t m_runtimeconfig_json;
-
-    private:
-        StatusCode process_header();
-    };
-}
-#endif // __INFO_H_