fix: allows env var to override linked project id

[sweatybridge]

What kind of change does this PR introduce?

Bug fix

What is the new behavior?

Setting SUPABASE_PROJECT_ID env var should override any linked project.

Additional context

Blocked on further testing.

[coveralls]

Pull Request Test Coverage Report for Build 9757976962

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 10 (100.0%) changed or added relevant lines in 1 file are covered.
• 8 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.03%) to 61.383%

---

Files with Coverage Reduction	New Missed Lines	%
internal/utils/flags/project_ref.go	1	85.71%
internal/storage/rm/rm.go	2	89.53%
internal/gen/keys/keys.go	5	11.76%

Totals
Change from base Build 9754745155:	-0.03%
Covered Lines:	7021
Relevant Lines:	11438

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 9758923763

Details

• 10 of 10 (100.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage remained the same at 61.192%

---

Files with Coverage Reduction	New Missed Lines	%
internal/utils/flags/project_ref.go	1	85.71%

Totals
Change from base Build 9757998779:	0.0%
Covered Lines:	7053
Relevant Lines:	11526

---

💛 - Coveralls