fix: use pgkit migra with experimental flag

[sweatybridge]

What kind of change does this PR introduce?

Bug fix #4044

What is the new behavior?

• Use pgkit migra behind --experimental flag
• Add self signed certs for node-postgres

Additional context

Add any other context or screenshots.

[coveralls]

Pull Request Test Coverage Report for Build 17174428125

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 10 of 32 (31.25%) changed or added relevant lines in 6 files are covered.
• 53 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+0.02%) to 54.739%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/db/diff/pgschema.go	0	1	0.0%
cmd/db.go	0	2	0.0%
internal/db/diff/migra.go	4	23	17.39%

Files with Coverage Reduction	New Missed Lines	%
internal/logout/logout.go	2	82.35%
internal/storage/rm/rm.go	2	80.61%
internal/utils/flags/project_ref.go	3	86.0%
internal/utils/access_token.go	4	95.65%
internal/gen/keys/keys.go	5	12.9%
internal/utils/api.go	5	89.69%
cmd/root.go	32	0.0%

Totals
Change from base Build 17091955725:	0.02%
Covered Lines:	6197
Relevant Lines:	11321

---

💛 - Coveralls