Drop AbortHandle from Connection::new

[jbesraa]

As those handles are mostly not used and they might cause ghost processes because tokio would not drop unneeded tasks if the handle is still in scope/explicitly returned.

resolves #1594

[codecov]

Codecov Report

Attention: Patch coverage is 38.23529% with 42 lines in your changes missing coverage. Please review.

Project coverage is 21.92%. Comparing base (5c63502) to head (a93bd8b).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...oles-utils/network-helpers/src/noise_connection.rs	42.37%	34 Missing ⚠️
roles/jd-client/src/lib/downstream.rs	0.00%	1 Missing ⚠️
roles/jd-client/src/lib/job_declarator/mod.rs	0.00%	1 Missing ⚠️
roles/jd-client/src/lib/template_receiver/mod.rs	0.00%	1 Missing ⚠️
roles/jd-client/src/lib/upstream_sv2/upstream.rs	0.00%	1 Missing ⚠️
roles/jd-server/src/lib/job_declarator/mod.rs	0.00%	1 Missing ⚠️
roles/mining-proxy/src/lib/upstream_mining.rs	0.00%	1 Missing ⚠️
roles/pool/src/lib/mining_pool/mod.rs	0.00%	1 Missing ⚠️
roles/translator/src/lib/upstream_sv2/upstream.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1595      +/-   ##
==========================================
+ Coverage   21.90%   21.92%   +0.02%     
==========================================
  Files         135      135              
  Lines        9578     9573       -5     
==========================================
+ Hits         2098     2099       +1     
+ Misses       7480     7474       -6     

Flag	Coverage Δ
binary_codec_sv2-coverage	0.00% <ø> (ø)
binary_sv2-coverage	10.12% <ø> (ø)
bip32_derivation-coverage	0.00% <ø> (ø)
buffer_sv2-coverage	37.68% <ø> (ø)
codec_sv2-coverage	0.03% <ø> (ø)
common_messages_sv2-coverage	0.25% <ø> (ø)
const_sv2-coverage	0.00% <ø> (ø)
error_handling-coverage	0.00% <ø> (ø)
framing_sv2-coverage	0.54% <ø> (ø)
jd_client-coverage	0.39% <0.00%> (+<0.01%)	⬆️
jd_server-coverage	12.42% <0.00%> (-0.02%)	⬇️
job_declaration_sv2-coverage	0.00% <ø> (ø)
key-utils-coverage	3.61% <ø> (ø)
mining-coverage	5.02% <ø> (ø)
mining_device-coverage	0.00% <0.00%> (ø)
mining_proxy_sv2-coverage	1.18% <0.00%> (ø)
noise_sv2-coverage	8.63% <ø> (ø)
pool_sv2-coverage	7.02% <41.93%> (+0.02%)	⬆️
protocols	30.61% <ø> (ø)
roles	12.19% <38.23%> (+0.03%)	⬆️
roles_logic_sv2-coverage	15.22% <ø> (ø)
sv2_ffi-coverage	0.00% <ø> (ø)
template_distribution_sv2-coverage	0.00% <ø> (ø)
translator_sv2-coverage	9.11% <0.00%> (ø)
utils	36.39% <ø> (ø)
v1-coverage	4.36% <ø> (ø)

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