Fix CI check and remove try-runtime command (#3046)

* CI: Fix check-try-runtime

(preparation for the monorepo)

Warnings should be treated as errors here, since this is how it will
be done in the monorepo.
I expect to see two errors in this check now.

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Allow deprecated

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Remove try-runtime command

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* make it compile

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Remove try-runtime-cli dependency

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

cumulus/Cargo.lock

@@ -9212,7 +9212,6 @@ dependencies = [
  "substrate-build-script-utils",
  "substrate-frame-rpc-system",
  "substrate-prometheus-endpoint",
- "try-runtime-cli",
  "xcm",
 ]
 
@@ -10617,7 +10616,6 @@ dependencies = [
  "substrate-state-trie-migration-rpc",
  "tempfile",
  "tokio",
- "try-runtime-cli",
  "wait-timeout",
  "xcm",
 ]
@@ -15865,7 +15863,6 @@ dependencies = [
  "async-trait",
  "clap",
  "frame-remote-externalities",
- "frame-try-runtime",
  "hex",
  "log",
  "parity-scale-codec",