HADOOP-19560. Update build instructions for Windows

[GauthamBanasandra]

Description of PR

• We recently upgraded vcpkg to install Boost 1.86 in HADOOP-19538. Update Boost to 1.86.0 in Windows build image #7601.
• This PR updates the build documentation for the same.

How was this patch tested?

Jenkins CI validation.

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[Copilot]

Pull Request Overview

This PR updates the Windows build instructions to reflect the recent upgrade of Boost to version 1.86 via vcpkg.

• Removed outdated instructions that referred to a specific commit hash
• Added new commands to fetch and checkout a vcpkg version tag ("2025.03.19") and updated dependency setup steps

Comments suppressed due to low confidence (1)

BUILDING.txt:601

• Please verify that '2025.03.19' is the correct version or tag required by Boost 1.86 and update the documentation if needed to avoid potential confusion.

git checkout 2025.03.19

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 32s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	shadedclient	37m 15s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	shadedclient	33m 38s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 37s		The patch does not generate ASF License warnings.
		73m 42s

Subsystem	Report/Notes
Docker	ClientAPI=1.49 ServerAPI=1.49 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7673/1/artifact/out/Dockerfile
GITHUB PR	#7673
Optional Tests	dupname asflicense codespell detsecrets
uname	Linux 15bb8d6521d4 5.15.0-136-generic #147-Ubuntu SMP Sat Mar 15 15:53:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 90268e0
Max. process+thread count	671 (vs. ulimit of 5500)
modules	C: . U: .
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7673/1/console
versions	git=2.25.1 maven=3.6.3
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[slfan1989]

@GauthamBanasandra LGTM.