fix: enable static framework setting in Kochava iOS Integration Podspec

About the issue

Our Flutter Kochava iOS integration throws the following transitive dependency issue if it's installed while having use_frameworks! in the Flutter-iOS app Podspec file:

[!] The 'Pods-Runner' target has transitive dependencies that include statically linked binaries: (Rudder-Kochava)

About the fix

We attempted to solve this issue by enabling the static framework setting in the Kochava iOS integration.

About chore changes

For the Flutter sample iOS app, I've changed from use_frameworks! :linkage=> :static to use_frameworks!. This is to ensure that we perform a default check for the dynamic linkage in the future and prevent this kind of error.

Type of change

[x] Bug fix (non-breaking change that fixes an issue)
[ ] New feature (non-breaking change that adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Fix [#1]()

Checklists

Development

[ ] Lint rules pass locally
[ ] The code changed/added as part of this pull request has been covered with tests
[ ] All tests related to the changed code pass in development

Code review

[ ] This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
[ ] "Ready for review" label attached to the PR and reviewers mentioned in a comment
[ ] Changes have been reviewed by at least one other engineer
[ ] Issue from task tracker has a link to this pull request

rudderlabs / rudder-sdk-flutter