fix(builder): don't wait for next block after bundle mine in auto

[dancoombs]

Proposed Changes

• Old code would always wait for the next block after a bundle was mined. Instead, if in auto bundling mode, we should immediately begin to build the next bundle after a bundle is mined.

[codecov]

Codecov Report

Attention: Patch coverage is 64.28571% with 5 lines in your changes missing coverage. Please review.

Project coverage is 58.72%. Comparing base (f09781e) to head (7131c03).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/builder/src/bundle_sender.rs	64.28%	5 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
crates/builder/src/bundle_sender.rs	73.43% <64.28%> (-0.41%)	⬇️

Flag	Coverage Δ
unit-tests	58.72% <64.28%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
rundler binary	0.00% <ø> (ø)
builder	63.23% <64.28%> (-0.08%)	⬇️
dev	∅ <ø> (∅)
pool	66.74% <ø> (ø)
provider	20.84% <ø> (ø)
rpc	25.87% <ø> (ø)
sim	76.76% <ø> (ø)
tasks	∅ <ø> (∅)
types	67.83% <ø> (ø)
utils	29.38% <ø> (ø)