refactor(stack): move transformers from manifest to stack package (aw…

…s#1903)

<!-- Provide summary of changes -->
To avoid a circular dependency and remove `manifest`'s de facto responsibility for the way its structs are used elsewhere, this PR moves all methods of the form:
```go
package manifest

func (s *ManifestStruct) Converter() template.Struct
``` 
to the form
```golang
package stack

func converter(s manifest.ManifestStruct) template.Struct
```

This makes `stack` responsible for the conversion logic and housing default values for fields that can be left unspecified in the manifest.

<!-- Issue number, if available. E.g. "Fixes aws#31", "Addresses aws#42, 77" -->

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chore(cli): add task delete validate/ask (aws#1831)

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Adds the skeleton of a new `task delete` command with Ask() and Validate() filled in. Tests for Ask() forthcoming, then I'll work on Execute in a separate PR. 

<!-- Issue number, if available. E.g. "Fixes aws#31", "Addresses aws#42, 77" -->

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fix(storage)!: allow attaching storage resources to jobs via `storage…

… init` (aws#1701)

<!-- Provide summary of changes -->
This PR enables customers to select from the list of services AND jobs when creating a new addons template through Storage Init. 

It also replaces the `--svc/-s` flag with a generic `--for` flag, which may be a breaking change for some customers. 

<!-- Issue number, if available. E.g. "Fixes aws#31", "Addresses aws#42, 77" -->
Addresses aws#1595 

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docs(site): fix typo on the homepage: Continous -> Continuous (aws#1676)

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Fixes typo on the homepage: Continous / Continuous

<!-- Issue number, if available. E.g. "Fixes aws#31", "Addresses aws#42, 77" -->

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chore: downgrade survey to 2.1.1 (aws#1650)

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<!-- Issue number, if available. E.g. "Fixes aws#31", "Addresses aws#42, 77" -->

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test(e2e): update init test's flags to accomodate for jobs (aws#1564)

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test(integ): add Stickiness to list of expect lb web service params (a…

…ws#1405)

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test(e2e): fix broken env init e2e test due to flag name change (aws#…

…1266)

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<!-- Issue number, if available. E.g. "Fixes aws#31", "Addresses aws#42, 77" -->

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chore(repository): add repository package to support building and pus…

…hing images (aws#1161)

This PR adds a repository package that builds and push images to a repository.

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feat: tighten permissions on task/execution role

Remove named based resource permissions in task role. Folks can use
addons feature to add arbitrary permissions to their task roles.

Add conditions to execution role to only pull secrets and params
that are tagged with copilot tags.