docs(SupportPolicy): Mark 1.x End-of-Support

[texastony]

Issue #, if available: Mark 1.x End-of-Support

Description of changes:
Update Support Policy, marking:

• 1.x as EOS
• 2.x as Maintenance
• 3.x as GA

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Check any applicable:

• Were any files moved? Moving files changes their URL, which breaks all hyperlinks to the files.

[texastony]

CB targets testNodeJS12 and testVectorsNodejs12 are failing due to:

[Container] 2022/08/26 19:06:47 Phase context status code: YAML_FILE_ERROR Message: Unknown runtime version named '12' of nodejs. This build image has the following versions: 10, 8

Will apply the container image fix.

[texastony]

CB target testVectorsBrowser also failed.

[Container] 2022/08/26 19:08:53 Running command npm run verdaccio-publish
...
Verdaccio requires at least Node.js v12 or higher and you have installed v10.19.0,
    please upgrade your Node.js distribution
...
lerna ERR! ECONNREFUSED request to http://localhost:4873/@aws-crypto%2fhkdf-node failed, reason: connect ECONNREFUSED 127.0.0.1:4873
lerna ERR! FetchError: request to http://localhost:4873/@aws-crypto%2fhkdf-node failed, reason: connect ECONNREFUSED 127.0.0.1:4873
lerna ERR!     at ClientRequest.req.on.er (/codebuild/output/src893995384/src/github.com/aws/aws-encryption-sdk-javascript/node_modules/minipass-fetch/lib/index.js:97:14)
...
lerna ERR! lerna request to http://localhost:4873/@aws-crypto%2fhkdf-node failed, reason: connect ECONNREFUSED 127.0.0.1:4873
/codebuild/output/src893995384/src/github.com/aws/aws-encryption-sdk-javascript/util/local_verdaccio_publish:54
...
npm ERR! Failed at the aws-encryption-sdk-javascript@0.0.1 verdaccio-publish script.

My cheap first choice of fix is to run this with NodeJS Latest...

[texastony]

For a9efb5e, CB target testVectorsBrowser failed:

[Container] 2022/08/26 19:33:49 Resolved 'nodejs' runtime alias 'latest' to '14'.
...
[Container] 2022/08/26 19:37:07 Running command npm run verdaccio-publish

...
npm ERR! Could not install from "../../../../../../../../../root/.npm/_npx/1075/lib/node_modules/@aws-crypto/integration-browser/node_modules/clients/client-sts" as it does not contain a package.json file.
...
npm ERR! aws-encryption-sdk-javascript@0.0.1 verdaccio-browser-decrypt: `./util/npx_verdaccio @aws-crypto/integration-browser decrypt -v 

This could be a transient error... re-running the CB.

Got the same error... looks like there may actually be something wrong with the client-sts.

[texastony]

Putting this aside for now as I focus on #994