RPC to allow setting the log filter (#7474)

* Add filter reload handle

* add RPC, move logging module from cli to tracing

* remove dup fn

* working example

* Update client/rpc-api/src/system/mod.rs

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

* Prefer "set" to "reload"

* Re-enable the commented out features of the logger

* Remove duplicate code

* cleanup

* unneeded lvar

* Bump to latest patch release

* Add new CLI option to disable log filter reloading,

Move profiling CLI options to SharedParams

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Applied suggestions from reviews

* Fix calls to init_logger()

* Handle errors when parsing logging directives

* Deny `system_setLogFilter` RPC by default

* One more time

* Don't ignore parse errors for log directives set via CLI or RPC

* Improve docs

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Update client/cli/src/config.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* fix merge errors

* include default directives with system_setLogFilter RPC,

implement system_rawSetLogFilter RPC to exclude defaults

* docs etc...

* update test

* refactor: rename fn

* Add a test for system_set_log_filter – NOTE: the code should likely change to return an error when bad directives are passed

* Update client/cli/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Address review grumbles

* Add doc note on panicking behaviour

* print all invalid directives before panic

* change RPCs to: addLogFilter and resetLogFilter

* make CLI log directives default

* add comments

* restore previous behaviour to panic when hard-coded directives are invalid

* change/refactor directive parsing

* fix line width

* add test for log filter reloading

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* finish up suggestions from code review

* improve test

* change expect message

* change fn name

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* add docs, remove unused fn

* propagate Err on invalid log directive

* Update tracing-subscriber version

* Improve docs for `disable_log_reloading` CLI param

Co-authored-by: Matt <mattrutherford@users.noreply.github.com>
Co-authored-by: David <dvdplm@gmail.com>
Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/client/rpc/Cargo.toml

@@ -37,6 +37,7 @@ sc-block-builder = { version = "0.8.0", path = "../../client/block-builder" }
 sc-keystore = { version = "2.0.0", path = "../keystore" }
 sp-transaction-pool = { version = "2.0.0", path = "../../primitives/transaction-pool" }
 sp-blockchain = { version = "2.0.0", path = "../../primitives/blockchain" }
+sc-tracing = { version = "2.0.0", path = "../../client/tracing" }
 hash-db = { version = "0.15.2", default-features = false }
 parking_lot = "0.10.0"
 lazy_static = { version = "1.4.0", optional = true }
@@ -50,6 +51,7 @@ sp-io = { version = "2.0.0", path = "../../primitives/io" }
 substrate-test-runtime-client = { version = "2.0.0", path = "../../test-utils/runtime/client" }
 tokio = "0.1.22"
 sc-transaction-pool = { version = "2.0.0", path = "../transaction-pool" }
+sc-cli = { version = "0.8.0", path = "../cli" }
 
 [features]
 test-helpers = ["lazy_static"]