feat: add flag to skip linking pooler

[sweatybridge]

What kind of change does this PR introduce?

feature

What is the new behavior?

Link to a project using direct connection if desired.

Additional context

Add any other context or screenshots.

[coveralls]

Pull Request Test Coverage Report for Build 18558080767

Details

• 23 of 29 (79.31%) changed or added relevant lines in 4 files are covered.
• 7 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.008%) to 54.579%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cmd/db.go	0	1	0.0%
internal/bootstrap/bootstrap.go	0	1	0.0%
cmd/link.go	0	2	0.0%
internal/link/link.go	23	25	92.0%

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 18555157550:	-0.008%
Covered Lines:	6389
Relevant Lines:	11706

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💛 - Coveralls