Add flag for latest version

[stdevMac]

Changes:

• Add a flag --latest to generate subcommands (full-node, execution, consensus and validator) to set latest as the image tag for client images.

Types of changes

• [x] New feature (non-breaking change which adds functionality)

Testing

Requires testing

• [x] Yes

In case you checked yes, did you write tests?

• [x] Yes

[codecov-commenter]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (23bcdfe) 86.74% compared to head (f3a9b35) 86.76%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #316 +/- ## =========================================== + Coverage 86.74% 86.76% +0.02% =========================================== Files 78 78 Lines 4548 4557 +9 =========================================== + Hits 3945 3954 +9 Misses 518 518 Partials 85 85 ``` | [Flag](https://app.codecov.io/gh/NethermindEth/sedge/pull/316/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/NethermindEth/sedge/pull/316/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth) | `86.76% <100.00%> (+0.02%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/NethermindEth/sedge/pull/316?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth) | Coverage Δ | | |---|---|---| | [cli/generate.go](https://app.codecov.io/gh/NethermindEth/sedge/pull/316?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth#diff-Y2xpL2dlbmVyYXRlLmdv) | `90.41% <100.00%> (+0.03%)` | :arrow_up: | | [cli/sub\_gen.go](https://app.codecov.io/gh/NethermindEth/sedge/pull/316?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth#diff-Y2xpL3N1Yl9nZW4uZ28=) | `93.80% <100.00%> (+0.12%)` | :arrow_up: | | [internal/pkg/generate/generate\_scripts.go](https://app.codecov.io/gh/NethermindEth/sedge/pull/316?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth#diff-aW50ZXJuYWwvcGtnL2dlbmVyYXRlL2dlbmVyYXRlX3NjcmlwdHMuZ28=) | `96.55% <100.00%> (+0.03%)` | :arrow_up: | | [internal/pkg/generate/types.go](https://app.codecov.io/gh/NethermindEth/sedge/pull/316?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=NethermindEth#diff-aW50ZXJuYWwvcGtnL2dlbmVyYXRlL3R5cGVzLmdv) | `100.00% <ø> (ø)` | |

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