Builders and searchers are being used interchangeably on mev-boost

[aslikaya]

Although builders may sometimes act as searchers and include transactions with MEV opportunities themselves, they have more responsibilities like building execution payloads so it is better not to use those interchangeably.

[raxhvl]

Thanks for flagging @aslikaya. Feel free to work on this.

[aslikaya]

I actually worked on it but waiting for the author's look on the changes to open the PR (as mentioned in PR checklist)

[taxmeifyoucan]

Thanks for the PR! This is resolved #271