This change the write to accept an options hash to make
it compatible with ActiveSupport::Cache::Store#write method.
The options hash are not passed to the underlying cache
implementation because RequestStore#write accepts only
a key, and value params.
The test was failing
https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/101444126 because
https://gitlab.com/gitlab-org/gitlab-ee/blob/a04056efad6639420b469eced5130751a8cf2757/ee/spec/support/request_store.rb
which is in EE only, clears the RequestStore before every test,
regardless of whether RequestStore is active. This test is unusual
because it sets up RequestStore without it being active, to make sure
that the tested code doesn’t attempt to use RequestStore. These two
unusual facts combined to cause the failure in EE only. The fix works
because of the particular order of RSpec hooks in the test lifecycle.
Makes it easier and safer to use RequestStore because you don't need to
check `RequestStore.active?` before using it. You just have to use
`Gitlab::SafeRequestStore` instead.
