feat: prepare mainnet runtime for registration

[al3mart]

Adds a new runtime crate pop-runtime with the following changes in comparison to pop-runtime-testnet:

• Barrier: allows for version subscriptions and removed unpaid execution.

pub type Barrier = TrailingSetTopicAsId<(
	TakeWeightCredit,
	AllowKnownQueryResponses<PolkadotXcm>,
	WithComputedOrigin<
		(AllowTopLevelPaidExecutionFrom<Everything>, AllowSubscriptionsFrom<Everything>),
		UniversalLocation,
		ConstU32<8>,
	>,
)>;

• pallet_collator_selection:

Sets the desired number of candidates to 0 and the maximum number of candidates to 0 too. Effectively allowing only invulnerable collators.

Relevant relay chain specific params.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 27.52137% with 424 lines in your changes missing coverage. Please review.

Project coverage is 11.21%. Comparing base (71d81b9) to head (8632306).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
runtime/mainnet/src/lib.rs	23.95%	273 Missing ⚠️
node/src/chain_spec.rs	27.77%	88 Missing and 3 partials ⚠️
node/src/command.rs	0.00%	27 Missing ⚠️
runtime/mainnet/src/config/proxy.rs	0.00%	15 Missing ⚠️
runtime/mainnet/src/config/xcm.rs	0.00%	6 Missing ⚠️
runtime/mainnet/src/weights/paritydb_weights.rs	73.33%	4 Missing ⚠️
runtime/mainnet/src/weights/rocksdb_weights.rs	73.33%	4 Missing ⚠️
runtime/mainnet/src/weights/block_weights.rs	81.81%	2 Missing ⚠️
runtime/mainnet/src/weights/extrinsic_weights.rs	81.81%	2 Missing ⚠️

@@            Coverage Diff            @@
##            main     #238      +/-   ##
=========================================
+ Coverage   6.40%   11.21%   +4.80%     
=========================================
  Files         27       34       +7     
  Lines       1997     2577     +580     
  Branches    1997     2577     +580     
=========================================
+ Hits         128      289     +161     
- Misses      1869     2285     +416     
- Partials       0        3       +3     

Files with missing lines	Coverage Δ
runtime/common/src/lib.rs	0.00% <ø> (ø)
runtime/testnet/src/lib.rs	3.89% <ø> (ø)
runtime/mainnet/src/weights/block_weights.rs	81.81% <81.81%> (ø)
runtime/mainnet/src/weights/extrinsic_weights.rs	81.81% <81.81%> (ø)
runtime/mainnet/src/weights/paritydb_weights.rs	73.33% <73.33%> (ø)
runtime/mainnet/src/weights/rocksdb_weights.rs	73.33% <73.33%> (ø)
runtime/mainnet/src/config/xcm.rs	0.00% <0.00%> (ø)
runtime/mainnet/src/config/proxy.rs	0.00% <0.00%> (ø)
node/src/command.rs	0.00% <0.00%> (ø)
node/src/chain_spec.rs	11.29% <27.77%> (+11.29%)	⬆️
... and 1 more

[evilrobot-01]

Various observations. See other PR to this one for a variety of fixes and improvements.

Note that the xcm and proxy config have not yet been reviewed.

[evilrobot-01]

Various XCM things which need resolving.

[evilrobot-01]

Just one final change.