Make getblocktemplate-rpcs a default feature

[teor2345]

Post-Merge TODOs

• Describe this newly stabilised feature in the CHANGELOG
• Arborist announcement
• Forum update

Motivation

Once we're happy to support the getblocktemplate RPCs, we can turn them on in all Zebra builds, by adding that feature to the default feature list:

zebra/zebrad/Cargo.toml

Lines 53 to 55 in 31426f3

	[features]
	# In release builds, don't compile debug logging code, to improve performance.
	default = ["release_max_level_info"]

Specifications

https://doc.rust-lang.org/cargo/reference/features.html#the-default-feature

Complex Code or Requirements

This is a well-supported Cargo configuration.

Testing

Some tests might need updates if they assume getblocktemplate-rpcs will always be disabled during the test. We should probably delete or disable those tests (ticket #7362).

[mpguerra]

Hey team! Please add your planning poker estimate with Zenhub @arya2 @oxarbitrage @teor2345 @upbqdn