MdePkg/Include/Protocol/BootManagerPolicy.h: Define GUID for connecting storage devices.

[apop5]

Description

Some platforms may require connecting storage media while booting to network, or require enumerating storage protocols that were not initially enumerated during BDS. This change adds a GUID to allow implementation of boot manager's ConnectDeviceClass to connect storage media.

• Impacts functionality?
  • Functionality - Does the change ultimately impact how firmware functions?
  • Examples: Add a new library, publish a new PPI, update an algorithm, ...
• Impacts security?
  • Security - Does the change have a direct security impact on an application,
    flow, or firmware?
  • Examples: Crypto algorithm change, buffer overflow fix, parameter
    validation improvement, ...
• Breaking change?
  • Breaking change - Will anyone consuming this change experience a break
    in build or boot behavior?
  • Examples: Add a new library class, move a module to a different repo, call
    a function in a new library class in a pre-existing module, ...
• Includes tests?
  • Tests - Does the change include any explicit test code?
  • Examples: Unit tests, integration tests, robot tests, ...
• Includes documentation?
  • Documentation - Does the change contain explicit documentation additions
    outside direct code modifications (and comments)?
  • Examples: Update readme file, add feature readme file, link to documentation
    on an a separate Web page, ...

How This Was Tested

N/A

Integration Instructions

N/A

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@                Coverage Diff                @@
##             release/202405     #989   +/-   ##
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  Coverage                  ?   43.42%           
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  Files                     ?      180           
  Lines                     ?    25101           
  Branches                  ?     6016           
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  Hits                      ?    10901           
  Misses                    ?    14135           
  Partials                  ?       65           

Flag	Coverage Δ
MdeModulePkg	17.80% <ø> (?)
MdePkg	51.59% <ø> (?)
NetworkPkg	8.53% <ø> (?)
UefiCpuPkg	39.84% <ø> (?)
UnitTestFrameworkPkg	6.01% <ø> (?)

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