feat: support multiple node_modules roots in require_patch

[tcarrio]

Refs: #266

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature (please, look at the "Scope of the project" section in the README.md file)
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

When referencing multiple node_modules from (npm|yarn)_install targets in a nodejs_(binary|target), you won't be able to resolve modules from all node_modules roots.

For example, having a separate yarn_install:

# setup stencil spec test dependencies
yarn_install(
    name = "npm_stencil_spec",
    exports_directories_only = True,
    frozen_lockfile = True,
    package_json = "//tools//stencil:spec/package.json",
    package_path = "tools/stencil/spec",
    yarn_lock = "//tools/stencil:spec/yarn.lock",
)

alongside the root:

yarn_install(
    name = "npm",
    data = ["//:.npmrc"],
    exports_directories_only = True,
    frozen_lockfile = True,
    package_json = "//:package.json",
    yarn_lock = "//:yarn.lock",
)

and referring to both of them in a test rule:

nodejs_test(
    name = "test",
    args = [
        "test",
    ],
    chdir = native.package_name(),
    data = [
        "@npm//@stencil/core",
        "@npm_stencil_spec//jest",
    ],
    entry_point = stencil_cli_path,
)

would result in the test run not being able to access the jest module.

Issue Number: #266

What is the new behavior?

Resolution of a require call will be done against all node_modules roots. The behavior is the same if it is not found.

Does this PR introduce a breaking change?

• Yes
• No

The prior behavior would have allowed for node_modules to be included without being able to be imported. Due to this, if anyone were relying on this undefined behavior to include node_modules data where importing that would have thrown an error, but I can't imagine a use case where this would be useful behavior to rely on.

Other information

Some minor adjustments to test case names such as "mode" updated to "module".

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[tcarrio]

I will need to add some documentation around this feature. The limitation currently is that you must define the two node modules roots under different paths with package_path since they can't be combined into a single directory implicitly. This makes sense, but it would be nice to note it somewhere.

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