receiver/postgresql: bump PostgreSQL minimal supported version to latest official supported

[kevinnoel-be]

Component(s)

receiver/postgresql

Is your feature request related to a problem? Please describe.

I see that this receiver is marked as supporting PG 9.6+ in the README. Do we still want to keep this much backwards compatibility given that this is quite an old, and unsupported for 2+ years, version now (list of PG versions here). It seems that the latest supported version is PG 12 with still ~9 months of support and we should maybe align on this?
This can make improvements, using more recent features (a bit?) harder or use less maintained/out-of-date modules versions (e.g. #30831)

Describe the solution you'd like

Update the prerequisites requirements for using this receiver (+ integration tests) to the latest officially supported PostgreSQL version

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• receiver/postgresql: @djaglowski

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[djaglowski]

I'm in support of this. Let's leave the issue open for a couple weeks so others can weigh in.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• receiver/postgresql: @djaglowski

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[djaglowski]

No one has argued otherwise. I suggest we initially add a deprecation warning to the changelog, then remove in a subsequent version.

[kevinnoel-be]

Created following PR for adding a deprecation notice in the changelog: #32093

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• receiver/postgresql: @djaglowski

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• receiver/postgresql: @djaglowski

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• receiver/postgresql: @djaglowski

See Adding Labels via Comments if you do not have permissions to add labels yourself.