Validator should be able to be configured to use GCP storage for checkpoints

[tkporter]

Problem

• GCP checkpoint storage is implemented and the relayer is seemingly capable of reading checkpoints
• Validator settings seem to not support this case though

Solution

• Update the match that validators use to support using GCP storage

  hyperlane-monorepo/rust/agents/validator/src/settings.rs

  Lines 151 to 195 in 44cc9bf

  	fn parse_checkpoint_syncer(syncer: ValueParser) -> ConfigResult<CheckpointSyncerConf> {
  	let mut err = ConfigParsingError::default();
  	let syncer_type = syncer.chain(&mut err).get_key("type").parse_string().end();
  	match syncer_type {
  	Some("localStorage") => {
  	let path = syncer
  	.chain(&mut err)
  	.get_key("path")
  	.parse_from_str("Expected checkpoint syncer file path")
  	.end();
  	cfg_unwrap_all!(&syncer.cwp, err: [path]);
  	err.into_result(CheckpointSyncerConf::LocalStorage { path })
  	}
  	Some("s3") => {
  	let bucket = syncer
  	.chain(&mut err)
  	.get_key("bucket")
  	.parse_string()
  	.end()
  	.map(str::to_owned);
  	let region = syncer
  	.chain(&mut err)
  	.get_key("region")
  	.parse_from_str("Expected aws region")
  	.end();
  	let folder = syncer
  	.chain(&mut err)
  	.get_opt_key("folder")
  	.parse_string()
  	.end()
  	.map(str::to_owned);
  	cfg_unwrap_all!(&syncer.cwp, err: [bucket, region]);
  	err.into_result(CheckpointSyncerConf::S3 {
  	bucket,
  	region,
  	folder,
  	})
  	}
  	Some(_) => {
  	Err(eyre!("Unknown checkpoint syncer type")).into_config_result(|| &syncer.cwp + "type")
  	}
  	None => Err(err),
  	}

• Probably get rid of the Some(_) branch so this doesn't happen again
• Probably worth a run to confirm it actually works, and maybe another pass on the code

[polymawutor]

@tkporter can i pick this up? this would be my first.

[daniel-savu]

we should also update out infra announce-validators.ts script to parse gcp paths and announce with that:

hyperlane-monorepo/typescript/infra/scripts/announce-validators.ts

Line 49 in bb470ae

if (location.startsWith('s3://')) {

but this is probably for another ticket

[daniel-savu]

@tkporter can i pick this up? this would be my first.

go for it @mawutory

[polymawutor]

thanks @daniel-savu here's what i believe is expected of me:

replace Some(_) with Some("gcp") having a similar structure as Some("s3")?

[daniel-savu]

closed in #3156 and other follow ups