Remove invalid Localytics podspec

This podspec specified a zip file that always pointed the the latest source, breaking versioning.

I will add properly versioned podspecs to Localytics-iOS-Client in a later commit.

refs https://github.com/CocoaPods/Specs/issues/8270
Change existing Localytics-iOS-Client specs to version permalinks

This will un-break versioning for current users of any of these specs.

refs https://github.com/CocoaPods/Specs/issues/8270
Add more Localytics-iOS-Client specs

This commit adds specs for other Localytics version permalinks I have, including the latest version (2.23.0).

refs https://github.com/CocoaPods/Specs/issues/8270
Merge pull request #9173 from cdzombak/cdz/backfill-Localytics-8270

Backfill properly-versioned Localytics-iOS-Client podspecs