feat: on dump accept .pgpass file

[samrose]

What kind of change does this PR introduce?

Accept a .pgpass file arg on supabase db dump command, to securely set password (a goal being to dump read replica from cli if not already possible)

[coveralls]

Pull Request Test Coverage Report for Build 17567530040

Details

• 0 of 4 (0.0%) changed or added relevant lines in 1 file are covered.
• 7 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.04%) to 54.772%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cmd/db.go	0	4	0.0%

Files with Coverage Reduction	New Missed Lines	%
internal/storage/rm/rm.go	2	80.61%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 17546214689:	-0.04%
Covered Lines:	6215
Relevant Lines:	11347

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💛 - Coveralls