feat: support multiple versions of the http extension (#1664)
* feat: support multiple versions of the http extension
Build multiple versions of the http extension on different PostgreSQL versions.
Add test for the extensions and their upgrade on PostgreSQL 15 and 17.
* feat: http multiversion extension and pg_regress tests
* chore: bump to test
* tests: local mock http server for http regress tests
* fix: a better way to handle http server for tests
* chore: bump to release
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Co-authored-by: Sam Rose <[email protected]>
