Perf review all Brave usage of data_decoder::DataDecoder::ParseJson*

[atuchin-m]

As was investigated in #30937 we spawn a lot of DataDecoder instances.
The primary sources are:

1. Wallet component: Optimize json sanitizing in Wallet #30940
2. APIRequestHelper (used by number of components)

We need:

1. disable sanitizing if we don't need it in a particular place. We don't need to sanitize local already validated data (like component updater content). We could also add no_sanitize option to APIRequestHelper;
2. Implement some policy to reuse DataDecoder instances (ask @brave/sec-team). For example, reusing an instance by key = profile + origin looks enough secure;
3. Do we need to sanitize jsons for Brave controller backend?
4. Add some metrics to monitor DataDecoder usage;
5. Stop sanitizing on the startup if possible.

[atuchin-m]

After the rust-based sanitizer is merged it's no more an actual problem: there is no more extra process spawning to sanity JSONs.
Closed

[atuchin-m]

#35886