Convert MQTTClientGJ Pod into XCFramework

[sanju-naik]

While building with Bazel MQTTClientGJ was throwing compiler version mismatch error. Since its a objective-C Pod we cannot add BUILD_LIBRARY_FOR_DISTRIBUTION = YES flag to it, hence converting it to a pre-built XCFramework.

Converting it to XCFramework solves the issue.

This MR:

• Converts MQTTClientGJ target from Static library to Static Framework
• Updates Podspec to distribute it as a pre-built framework rather than source

We did try to solve it the way it's integrated today, i.e distributing it as a source framework, and raised the issue on - https://github.com/bazelbuild/rules_apple/issues/2247 but responses were not helpful in resolving the issue, considering our project Timeline we are going ahead with merging this as XCFramework we will come back to this again in future and debug why adding it as a source code framework doesn't work.

[sanju-naik]

@alfianlosari mas build is green now please review. Also I have bumped only MQTTClientGJ Pod version and updated it in other Podspec, please review that change also once.

[sanju-naik]

@alfianlosari iOS 15 Crash is fixed mas, it was happening because I didn't change the deployment target while generating XCFramework and it was set to 16.4 by default hence it was causing that issue.

The crash fix is verified by QA here - https://gojek.slack.com/archives/C0LBUG18U/p1694068730020989?thread_ts=1692862446.539609&cid=C0LBUG18U .

Please review review this MR mas.