Convert to use GraphQL in issues page refactor [RUN ALL RSPEC]

What does this MR do?

This MR updates the issues list refactor #322755 (closed) to use GraphQL instead of REST. The refactor is behind the feature flag :vue_issues_list, defaulted to off.

This MR updates components so that all UI elements continue displaying as expected on the issues page, and pagination continues working but without page numbers as GraphQL doesn't support jumping to specific pages. This MR does not update issues_list_app.vue to continue working as expected for sorting and filtering—this will be done in the following MR so as not to bloat this one.

This was previously merged in !62312 (merged) but reverted due to a FOSS failure, so this MR runs as FOSS with [RUN ALL RSPEC]. This MR also is broken down smaller because !62312 (merged) was quite large to review.

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

• I have included a changelog entry, or it's not needed. (Does this MR need a changelog?)
• I have added/updated documentation, or it's not needed. (Is documentation required?)
• I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
• I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
• I have self-reviewed this MR per code review guidelines.
• This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines)
• I have followed the style guides.
• This change is backwards compatible across updates, or this does not apply.

Availability and Testing

• I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.)
• I have tested this MR in all supported browsers, or it's not needed.
• I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.

Security

Does this MR contain changes to processing or storing of credentials or tokens, authorization and authentication methods or other items described in the security review guidelines? If not, then delete this Security section.

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Related to #322755 (closed)