Add filter option for subscribed issues

[qwerty287]

This pull request adds a filter option "subscribed" to the /issues overview and to the lists in in the repos (and to the API). Addresses #16111 (and closes the first part of it).

I know that the SQL command here is a very long and complex SQL command, but I didn't find another working way (I don't know enough about these xorm.Session conditions) and it works. The command just filters the issues if they are in the issue_watch table and is_watching is 1 or if they are in the comment table but not in the list of issues in issue_watch where is_watching is 0 or if they are in the issues table but not in the list of issues in issue_watch where is_watching is 0. If you know another way how to make this more readable, it would be nice if you could comment.

[qwerty287]

Probably, this is a very bad question, but how do I fix this test-pgsql integration test? Unfortunately, I don't know how to fix them. The errors are (in two different files):

GetUserIssueStats: operator does not exist: boolean = integer
pull_review_test.go:16:
    Error Trace:	integration_test.go:449 	 				
        integration_test.go:282 	 				
        pull_review_test.go:16 	
    Error: 	
        Not equal: 	 	
            expected: 200 	 	
            actual : 500 	
Test: 	TestPullView_ReviewerMissed

I fixed it now. You can review this PR :)

[codecov-commenter]

Codecov Report

Merging #17053 (92bcb21) into main (f2e7d54) will decrease coverage by 0.00%.
The diff coverage is 28.57%.

@@            Coverage Diff             @@
##             main   #17053      +/-   ##
==========================================
- Coverage   45.31%   45.30%   -0.01%     
==========================================
  Files         773      773              
  Lines       86873    86907      +34     
==========================================
+ Hits        39366    39376      +10     
- Misses      41151    41170      +19     
- Partials     6356     6361       +5     

Impacted Files	Coverage Δ
routers/api/v1/repo/issue.go	47.40% <0.00%> (-0.25%)	⬇️
routers/web/user/home.go	58.33% <0.00%> (-0.42%)	⬇️
models/issue.go	57.99% <26.08%> (-0.59%)	⬇️
routers/web/repo/issue.go	38.57% <66.66%> (+0.06%)	⬆️
models/gpg_key_common.go	59.67% <0.00%> (-4.84%)	⬇️
modules/queue/queue_channel.go	95.00% <0.00%> (-1.67%)	⬇️
modules/log/file.go	73.60% <0.00%> (-1.61%)	⬇️
services/pull/pull.go	41.78% <0.00%> (-0.41%)	⬇️
modules/queue/workerpool.go	48.85% <0.00%> (-0.39%)	⬇️
models/issue_comment.go	51.90% <0.00%> (+0.29%)	⬆️
... and 3 more

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[qwerty287]

Closing this as it's better solved by #17156