Set collator minimum bond to 4M KMA

[Garandor]

Description

Calamari Functional change:

• collators below 4mil are no longer considered for collator assignment
  https://github.com/Manta-Network/Manta/pull/937/files#diff-b616758683d3c1926eb58a1b16a2b439122f36e4738af354b42addc5daf2cc83R22

Testing changes:

• add regression test for 400k-bonded collators
• add parachain_staking to integration_test mock
• refactored integration test for lazy_static ALICE-FERDIE keys

relates to OR closes: #933

---

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Situational Notes:

• If adding functionality, write unit tests!
• If importing a new pallet, choose a proper module index for it, and allow it in BaseFilter. Ensure every extrinsic works from front-end. If there's corresponding tool, ensure both work for each other.
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• If modifying existing runtime storage items, make sure to implement storage migrations for the runtime and test them with try-runtime. This includes migrations inherited from upstream changes, and you can search the diffs for modifications of #[pallet::storage] items to check for any.
• If runtime changes, need to update the version numbers properly:
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  • spec_version: The version of the runtime specification. A full node will not attempt to use its native runtime in substitute for the on-chain Wasm runtime unless all of spec_name, spec_version, and authoring_version are the same between Wasm and native.
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  • transaction_version: The version of the extrinsics interface. This number must be updated in the following circumstances: extrinsic parameters (number, order, or types) have been changed; extrinsics or pallets have been removed; or the pallet order in the construct_runtime! macro or extrinsic order in a pallet has been changed. You can run the metadata_diff.yml workflow for help. If this number is updated, then the spec_version must also be updated
• Verify benchmarks & weights have been updated for any modified runtime logics

[ghzlatarev]

Looks good, linters are failing though.
Also are there some easy tests that can be moved from teh QA sheet ?

[Garandor]

Also are there some easy tests that can be moved from teh QA sheet ?

Addressed all comments except the one above, i'll leave this to another PR