This commit adds all the functions required for parachain candidate
validations.

With this commit, we are able to take candidate receipts and
	- get validation data for it,
	- perform basic checks on it,
	- run respective parachain's validate_block on parachain's
	  runtime,
	- get validate results from parachain's runtime and verify those
	  validation results again relaychain runtime,
	- and declare candidate as valid or invalid in the end.

This commit also includes tests for candidate validation.

…3281)

Co-authored-by: Eclésio Junior <eclesiomelo.1@gmail.com>
Co-authored-by: Edward Mack <emack@pop-os.localdomain>

Co-authored-by: Kishan Sagathiya <kishansagathiya@gmail.com>

Co-authored-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>

…ution message (#3355)

…ement/1 protocol (#3354)

- Added `StatementFetchingRequest` and `StatementFetchingResponse`  varying data types.

- implemented 'network.Message` interface in `StatementFetchingRequest` and 'network.ResponseMessage` interface in `StatementFetchingResponse` as they will be passed into `func (rrp *RequestResponseProtocol) Do(to peer.ID, req Message, res ResponseMessage) error` function as `req` and `res`.

- I didn't want to create a new YAML file here. so I decided to rename the YAML file name and variable(in which data of the YAML file getting unmarshalled) name so that I can use them in this PR.

…collation/1 protocol (#3356)

…chunk/1 protocol (#3362)

- Added `ChunkFetchingRequest` and `ChunkFetchingResponse` types.

- implemented network.Message interface in `ChunkFetchingRequest` and 'network.ResponseMessage' interface in `ChunkFetchingResponse`

…available_data/1 protocol (#3368)

- Added AvailableDataFetchingRequest and AvailableDataFetchingResponse types.
- Implemented 'network.Message' interface in AvailableDataFetchingRequest and 'network.ResponseMessage' interface in AvailableDataFetchingResponse as they will be passed into this function as req and res.

…g statement and collation (#3374)

added New() method and decode test for below varying data types. 
- statement
- statement distribution message
- collation protocol
- collator protocol message

…pov/1 protocol (#3365)

- Added PoVFetchingRequest and PoVFetchingResponse types.
- Implemented 'network.Message' interface in PoVFetchingRequest and 'network.ResponseMessage' interface in PoVFetchingResponse as they will be passed into this function as req and res.

#3277)

- Added parachain service
- Registered collation and validation protocol
- Confirmed that we can communicate with collators by talking to them in `run()` function

Implemented following parachain host runtime calls
- ParachainHost_persisted_validation_data
- ParachainHost_validation_code

…lidation

Co-authored-by: Eclésio Junior <eclesiomelo.1@gmail.com>

…om:ChainSafe/gossamer into kishan/feat/parachain-candidate-validation

…lidation