Upgrade Postgres to version 14.0

[akankshakumari393]

Change Overview

Upgrade base image of postgres-kanister-tools image to postgres:14.0-alpine
Upgrade base image of postgresql image to postgresql:14.0.0

Pull request type

Please check the type of change your PR introduces:

• 🚧 Work in Progress
• 🌈 Refactoring (no functional changes, no api changes)
• 🐹 Trivial/Minor
• 🐛 Bugfix
• 🌻 Feature
• 🗺️ Documentation
• 🤖 Test

Issues

• May I request to support PostgreSQL 14+? #1131

Test Plan

• 💪 Manual
• ⚡ Unit test
• 💚 E2E

Test Scenario: 1
Postgres kanister tool version 14 and postgresql version 14
Build the latest images for ghcr.io/kanisterio/postgresql and ghcr.io/kanisterio/postgres-kanister-tools using
goreleaser release --skip-publish --snapshot --rm-dist
Once the image is build

• update tag with the new image tag.
• Update Blueprints with the new image tag for both images.

./build/integration-test.sh "^PostgreSQL$|^PITRPostgreSQL|^RDSPostgreSQL"
https://gist.github.com/A-kanksh-a/3bfabbd8f5adff7a82c0a396a583e209

Test Scenario: 2
Postgres kanister tool version 14 and postgresql version 13

Build the latest images for ghcr.io/kanisterio/postgres-kanister-tools using
goreleaser release --skip-publish --snapshot --rm-dist
Once the image is build

• Update Blueprints with the new image tag.

./build/integration-test.sh "^PostgreSQL$|^PITRPostgreSQL|^RDSPostgreSQL"
https://gist.github.com/A-kanksh-a/a44e74bc46093f28c9fa0c0a7f732653

logs for PITR - https://gist.github.com/A-kanksh-a/ee72ea8456372b212a0dda1b93be83fc