fix: parse nested options

[karenc-bq]

Description

The driver was incorrectly truncating nested connection options when parsing connection urls.
Connecting with a string similar to ?options=-c%20search_path=test,public,pg_catalog%20-c%20statement_timeout=90000 would result in unexpected errors:

Exception in thread "main" org.postgresql.util.PSQLException: FATAL: -c search_path requires a value

This PR updates the parsing logic to properly handle nested options.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[github-actions]

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It seems all right 👌

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[sergiyvamz]

I'd expect such parameter value to be encoded:

?options=-c%20search_path%3Dtest%2Cpublic%2Cpg_catalog%20-c%20statement_timeout%3D90000