temporarily use google-cloud-aiplatform 1.11.0 and bump version

This allows us to release XManager 0.1.5 to PyPi
This release will not contain the fix to google-cloud-aiplatform which fixes logged_web_access_uris
googleapis/python-aiplatform@198a1b5

PiperOrigin-RevId: 434741510
Change-Id: Ie3f9fa34d9bf0a2837795504038feebf6a697aa6
GitOrigin-RevId: 873e6d88304131789720ba9c1db6c3bcac3bb16a

Increase version of XManager PyPI package.

PiperOrigin-RevId: 426121302
Change-Id: I242c3b54d6f363880b6e4da12ede1a6914cda0d5
GitOrigin-RevId: 89524b5b6dd6b841487e170bc503c5e1ac00b7cb

Increase version to 0.1.3 for the next PyPI release.

PiperOrigin-RevId: 407575299
Change-Id: I36bc172021d9d781aba74b1d45628b79b22f8c6d
GitOrigin-RevId: efcb16b6f5924a0f7340b16cb7dc2814aff8eee5

Decorate the PyPI page and reference it from README.md

PiperOrigin-RevId: 401263947
Change-Id: I5396e02840e881dee81b571d3a6acbd9a7a9ccfe
GitOrigin-RevId: db2e7e61ecb528a4e7ff3852d7cbc835a7c69b39

Acknowledge PR / issues status in CONTRIBUTING.md

PiperOrigin-RevId: 401223405
Change-Id: Iaacb66d4f766c440b6ba06170939c191688368dd
GitOrigin-RevId: d7b3522d2ddbce7979e4f1c285e96f79e856b406