fix: prevent validations on encrypted values

[mdonnalley]

What does this PR do?

Prevent validation from being re-run on encrypted values

Testing

Create a plugin using sf dev generate plugin and add this command:

import { SfCommand, Flags } from '@salesforce/sf-plugins-core';
import { Config } from '@salesforce/core';

// eslint-disable-next-line sf-plugin/command-example
export default class StoreToken extends SfCommand<void> {
  // eslint-disable-next-line sf-plugin/no-hardcoded-messages-commands
  public static readonly summary = 'Programmatically set a token in the global config';

  public static readonly flags = {
    token: Flags.string({
      required: true,
      // eslint-disable-next-line sf-plugin/no-hardcoded-messages-flags
      summary: 'a token to store',
    }),
  };

  public async run(): Promise<void> {
    const { flags } = await this.parse(StoreToken);

    const config = await Config.create({ isGlobal: true, encryptedKeys: ['local-web-server-identity-token'] });
    Config.addAllowedProperties([
      {
        key: 'local-web-server-identity-token',
        description: 'Token for local web server identity',
        encrypted: true,
        input: {
          validator: (value): boolean => typeof value === 'string' && value.startsWith('123'),
          failedMessage: 'Token must start with 123',
        },
      },
    ]);
    config.set('local-web-server-identity-token', flags.token);

    await config.write();

    this.log('Done!');
  }
}

Without this change, it will fail validation since the validator is rerun during write (which calls this.cryptProperties(true), which calls set, which is was calls all the validators)

With the change, the validator is called just once during the initial set for encrypted properties

What issues does this PR fix or reference?

@W-16049112@

[mshanemc]

error replicates using QA as described

✅ --token abc still fails
✅ global config file has an encrypted value