[MacPorts] #67039: Update bazel to 6.0.0

[MacPorts]

#67039: Update bazel to 6.0.0
--------------------------+--------------------
 Reporter:  kickingvegas  |      Owner:  (none)
     Type:  request       |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.8.1
 Keywords:  bazel         |       Port:  bazel
--------------------------+--------------------
 In **!MacPorts**, the current version of **bazel** is at 4.2.2
 <https://ports.macports.org/port/bazel/details/>

 However, the current release of **bazel** is at 6.0.0 as of 2023-03-04.
 <https://github.com/bazelbuild/bazel/releases/tag/6.0.0>

 Request is to please update **bazel** to 6.0.0 on **!MacPorts**.

 In particular this is driven by desire to support building **swiftlint**
 <https://github.com/realm/SwiftLint> using tools from **!MacPorts** which
 in this case, includes **bazel**.

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Ticket URL: <https://trac.macports.org/ticket/67039>
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