Honor sslmode=disable for db connections (fix TLS regression)

[Flamki]

What kind of change does this PR introduce?

Bug fix.

What is the current behavior?

CLI 2.75.x attempts a TLS connection even when sslmode=disable is set in --db-url, causing tls error (server refused TLS connection). The same command succeeds with --debug because TLS is disabled there.
Issue: #4839 (regression of #4288)

What is the new behavior?

When sslmode=disable is present in the connection string, the CLI explicitly disables TLS, so non‑TLS self‑hosted databases connect successfully without needing --debug.

Additional context

This aligns normal behavior with the --debug path, which already disables TLS. No user‑visible changes beyond respecting sslmode=disable.

[Flamki]

CI status note:

• CI / Codegenfails duringgo generatewithDiskRequestBody` discriminator mapping (pre-existing issue).
• CI / Linkfails due to missingproject-ref` flag in CI.

All build/lint/test checks for this change are green.

[coveralls]

Pull Request Test Coverage Report for Build 21875711915

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.02%) to 60.55%

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

Totals
Change from base Build 21859441939:	-0.02%
Covered Lines:	7751
Relevant Lines:	12801

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💛 - Coveralls