Updated:
	batchbuilder
	common
	coordinator
	db/statedb
	eth
	log
	node
	priceupdater
	prover
	synchronizer
	test/*
	txprocessor
	txselector

Pending (once
https://github.com/hermeznetwork/hermez-node/tree/feature/serveapicli is
merged to master):
	Update golangci-lint version to v1.37.1
	api
	apitypes
	cli
	config
	db/historydb
	db/l2db

PriceUpdater:
    - Pass context so that it can be canceled during an update loop
    - Define APITypes to make it explicit which API we are using

Add linter checks to GHA & Fix code to pass lints.
The linters added are:
- whitespace: Tool for detection of leading and trailing whitespace
- gosec: Inspects source code for security problems
- gci: Gci control golang package import order and make it always deterministic
- misspell: Finds commonly misspelled English words in comments
- gomnd: An analyzer to detect magic numbers

The file utils/utils.go is excluded from the checks of gomnd, as uses magic numbers through the code

* First price-updater implementation

* Lint corrections

* Structs revision

* Read Write Mutex

* Review price updater and apply small changes

Co-authored-by: Toni Ramírez <toni@iden3.com>
Co-authored-by: Eduard S <eduard@iden3.io>