add shutdown api to pool

[Shourya742]

closes: #1320

[codecov]

Codecov Report

Attention: Patch coverage is 4.54545% with 21 lines in your changes missing coverage. Please review.

Project coverage is 19.07%. Comparing base (e228c19) to head (1cea297).

Files with missing lines	Patch %	Lines
roles/pool/src/lib/mining_pool/mod.rs	0.00%	12 Missing ⚠️
roles/pool/src/lib/mod.rs	10.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1380      +/-   ##
==========================================
- Coverage   19.08%   19.07%   -0.02%     
==========================================
  Files         166      166              
  Lines       11066    11080      +14     
==========================================
+ Hits         2112     2113       +1     
- Misses       8954     8967      +13     

Flag	Coverage Δ
binary_codec_sv2-coverage	0.00% <ø> (ø)
binary_serde_sv2-coverage	3.55% <ø> (ø)
binary_sv2-coverage	5.34% <ø> (ø)
bip32_derivation-coverage	0.00% <ø> (ø)
buffer_sv2-coverage	25.02% <ø> (ø)
codec_sv2-coverage	0.01% <ø> (ø)
common_messages_sv2-coverage	0.13% <ø> (ø)
const_sv2-coverage	0.00% <ø> (ø)
error_handling-coverage	0.00% <ø> (ø)
framing_sv2-coverage	0.28% <ø> (ø)
jd_client-coverage	0.00% <ø> (ø)
jd_server-coverage	7.79% <ø> (ø)
job_declaration_sv2-coverage	0.00% <ø> (ø)
key-utils-coverage	2.39% <ø> (ø)
mining-coverage	2.44% <ø> (+0.01%)	⬆️
mining_device-coverage	0.00% <ø> (ø)
mining_proxy_sv2-coverage	0.70% <ø> (ø)
noise_sv2-coverage	4.44% <ø> (ø)
pool_sv2-coverage	2.11% <4.54%> (+0.06%)	⬆️
protocols	24.57% <ø> (ø)
roles	6.54% <4.54%> (+<0.01%)	⬆️
roles_logic_sv2-coverage	7.93% <ø> (ø)
sv2_ffi-coverage	0.00% <ø> (ø)
template_distribution_sv2-coverage	0.00% <ø> (ø)
translator_sv2-coverage	9.60% <ø> (ø)
utils	25.13% <ø> (ø)
v1-coverage	2.41% <ø> (ø)

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[jbesraa]

Same as with #1376, I think we should wait with this for a bit