Extracted push and pull of the contract in the dispatching logic

[xgreenx]

Extracted push and pull of the contract in the dispatching logic to reduce the size of the contracts.

It is part of the #1017. It is easy to review and it can be part of a stable release=)

[codecov-commenter]

Codecov Report

Merging #1174 (0bcc986) into master (dd2e4fb) will increase coverage by 0.48%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1174      +/-   ##
==========================================
+ Coverage   78.54%   79.02%   +0.48%     
==========================================
  Files         229      229              
  Lines        8715     8667      -48     
==========================================
+ Hits         6845     6849       +4     
+ Misses       1870     1818      -52     

Impacted Files	Coverage Δ
crates/lang/src/codegen/dispatch/execution.rs	0.00% <ø> (ø)
crates/lang/codegen/src/generator/dispatch.rs	94.49% <100.00%> (ø)
crates/lang/tests/ui/contract/pass/event-topics.rs	1.92% <0.00%> (+0.03%)	⬆️
...tes/lang/tests/ui/contract/pass/event-anonymous.rs	1.92% <0.00%> (+0.03%)	⬆️
...g/tests/ui/contract/pass/event-many-definitions.rs	2.63% <0.00%> (+0.06%)	⬆️
...tests/ui/contract/pass/event-config-more-topics.rs	3.57% <0.00%> (+0.12%)	⬆️
crates/lang/tests/ui/contract/pass/env-access.rs	4.00% <0.00%> (+0.15%)	⬆️
.../tests/ui/contract/pass/constructor-many-inputs.rs	6.66% <0.00%> (+0.41%)	⬆️
...ang/tests/ui/contract/pass/impl-block-using-env.rs	9.09% <0.00%> (+0.75%)	⬆️
...ts/ui/contract/pass/trait-message-payable-guard.rs	10.00% <0.00%> (+0.90%)	⬆️
... and 22 more

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[paritytech-cicd-pr]

🦑 📈 ink! Example Contracts ‒ Changes Report 📉 🦑

These are the results when building the examples/* contracts from this branch with cargo-contract 0.17.0-191b588 and comparing them to ink! master:

	Δ Optimized Size	Δ Used Gas	Total Optimized Size	Total Used Gas
accumulator	-0.10 K		1.03 K
adder	+0.01 K		2.19 K
contract-introspection			2.39 K
contract-terminate			0.94 K	214_418
contract-transfer			8.15 K	14_418
delegator	+0.27 K	-314	6.39 K	46_302
dns	-0.41 K		8.98 K	43_254
erc1155	-0.56 K		26.67 K	86_508
erc20	-0.35 K		8.60 K	43_254
erc721	-1.34 K		11.93 K	115_344
flipper	-0.10 K		1.31 K	14_418
incrementer	-0.10 K		1.21 K	14_418
multisig	-0.55 K	-260	25.33 K	93_541
proxy	-0.13 K	-48	2.93 K	29_538
rand-extension	-0.21 K		4.00 K	14_418
subber	+0.01 K		2.21 K
trait-erc20	-0.35 K		8.88 K	43_254
trait-flipper	-0.10 K		1.00 K	14_418
trait-incrementer	-0.09 K		1.19 K	28_836
upgradeable-contract	-0.09 K		3.02 K

Link to the run | Last update: Fri Mar 11 08:29:47 CET 2022

[HCastano]

Looks good!