Update use of the enable_beta_ecosystems experiment

[markhallen]

What are you trying to accomplish?

The previous implementation was incorrect. This PR correctly sets the :enable_beta_ecosystems experiment state. We are also removing the more specific :bun_updates feature as it is now redundant.

This is a follow-up/fix for Handle enable_beta_ecosystems boolean setting #11334

How will you know you've accomplished your goal?

./bin/docker-dev-shell npm_and_yarn --rebuild
./bin/dry-run.rb npm_and_yarn dsp-testing/dependabot-bun-public --enable-beta-ecosystems

Expected output

 => bump @types/bun from 1.1.16 to 1.1.18

    ± bun.lock
    ~~~
    --- /tmp/original20250122-2574-6rmd3r       2025-01-22 11:34:43.796832648 +0000
    +++ /tmp/updated20250122-2574-1wx5kf        2025-01-22 11:34:43.796832648 +0000
    @@ -2,10 +2,9 @@
       "lockfileVersion": 0,
       "workspaces": {
         "": {
    -      "name": "minimal-dependabot-bun",
           "dependencies": {
             "express": "^4.21.2",
    -        "lodash": "4.17.20",
    +        "lodash": "^4.17.21",
           },
           "devDependencies": {
             "@types/bun": "latest",
    @@ -16,7 +15,7 @@
         },
       },
       "packages": {
    -    "@types/bun": ["@types/[email protected]", "", { "dependencies": { "bun-types": "1.1.43" } }, "sha512-E+ue6NMcn4FXC5bDRE1W/BXUVs01h5Mt02qH8/8HGCox9akuh8KNOFdwvaQS9TDgT2RmUyJYFRRqA60WtTnm2g=="],
    +    "@types/bun": ["@types/[email protected]", "", { "dependencies": { "bun-types": "1.1.44" } }, "sha512-gtw6cIv/8Q530D0BmoYnjEzR65SjVq2SaUE0NeU6tbm7QBMsTZ61/NBNERtK/FUJaoi7PiteUohK7JcrXBCkvw=="],
     
         "@types/node": ["@types/[email protected]", "", { "dependencies": { "undici-types": "~5.26.4" } }, "sha512-scnD59RpYD91xngrQQLGkE+6UrHUPzeKZWhhjBSa3HSkwjbQc38+q3RoIVEwxQGRw3M+j5hpNAM+lgV3cVormg=="],
     
    @@ -28,7 +27,7 @@
     
         "body-parser": ["[email protected]", "", { "dependencies": { "bytes": "3.1.2", "content-type": "~1.0.5", "debug": "2.6.9", "depd": "2.0.0", "destroy": "1.2.0", "http-errors": "2.0.0", "iconv-lite": "0.4.24", "on-finished": "2.4.1", "qs": "6.13.0", "raw-body": "2.5.2", "type-is": "~1.6.18", "unpipe": "1.0.0" } }, "sha512-7rAxByjUMqQ3/bHJy7D6OGXvx/MMc4IqBn/X0fcM1QUcAItpZrBEYhWGem+tzXH90c+G01ypMcYJBO9Y30203g=="],
     
    -    "bun-types": ["[email protected]", "", { "dependencies": { "@types/node": "~20.12.8", "@types/ws": "~8.5.10" } }, "sha512-W0wCtVH+bwFp7p3Zgs03CqxEDmXxEvmmUM/FBKgWIv9T8gyeotvIjIbHzuDScc2DphhRNtr7hJLCR5PspYL5qw=="],
    +    "bun-types": ["[email protected]", "", { "dependencies": { "@types/node": "~20.12.8", "@types/ws": "~8.5.10" } }, "sha512-jtcekoZeSINgEcHSISzhR13w/cyE+Fankw2Cpl4c0fN3lRmKVAX0i9ay4FyK4lOxUK1HG4HkuIlrPvXKz4Y7sw=="],
     
         "bytes": ["[email protected]", "", {}, "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg=="],
     
    @@ -94,7 +93,7 @@
     
         "ipaddr.js": ["[email protected]", "", {}, "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g=="],
     
    -    "lodash": ["[email protected]", "", {}, "sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA=="],
    +    "lodash": ["[email protected]", "", {}, "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg=="],
     
         "math-intrinsics": ["[email protected]", "", {}, "sha512-/IXtbwEk5HTPyEwyKX6hGkYXxM9nbj64B+ilVJnC/R6B0pH5G4V3b0pVbL7DBj4tkhBAppbQUlf6F6Xl9LHu1g=="],
     
    ~~~
    5 insertions (+), 6 deletions (-)

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.