CIs should skip check and debug builds

[SakulFlee]

CI times are getting out of hand and need to be reduced. Space requirements too.

Currently we are running (per platform):

• Clippy (global)
• Check
• Debug Build
• Release Build

Not only does building make checking obsolete, but Clippy is already checking for us. Furthermore, we are interested in Release builds, thus we can skip Debug builds. The proposal is to only keep Clippy and Release builds.

The same applies to testing: We only are interested in Release tests :)

Changes required

GitHub Actions

• [x] Android
• [x] iOS
• [x] macOS
• [x] Linux
• [x] Windows
• [x] WebAssembly

Azure DevOps

• [x] Android
• [x] iOS
• [x] macOS
• [x] Linux
• [x] Windows
• [x] WebAssembly

BitBucket Pipelines

• [x] Linux

GitLab CI

• [x] Linux

CircleCI

• [x] Android
• [x] iOS
• [x] macOS
• [x] Linux
• [x] Windows
• [x] WebAssembly

Travis

• [x] Linux

TeamCity

• [x ] Linux

AppVeyor

• [x] Linux

[create-issue-branch[bot]]

Branch issue-187-CIs_should_skip_check_and_debug_builds created for issue: CIs should skip check and debug builds