HADOOP-19844. Update Dockerfile path to include OS platform suffix

[cxzl25]

Description of PR

Porting HADOOP-19540 to the 3.4 branch is missing a line, resulting in the inability to specify dockfile.

How was this patch tested?

local test

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?

AI Tooling

If an AI tool was used:

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[arp7]

+1

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	19m 37s		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.
+0 🆗	shelldocs	0m 0s		Shelldocs was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ branch-3.4 Compile Tests _
+1 💚	mvninstall	54m 42s		branch-3.4 passed
+1 💚	mvnsite	22m 22s		branch-3.4 passed
+1 💚	shadedclient	37m 26s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	47m 48s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	19m 10s		the patch passed
+1 💚	shellcheck	0m 0s		No new issues.
+1 💚	shadedclient	36m 57s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	19m 42s		root in the patch passed.
+1 💚	asflicense	1m 3s		The patch does not generate ASF License warnings.
		262m 48s

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8355/1/artifact/out/Dockerfile
GITHUB PR	#8355
Optional Tests	dupname asflicense mvnsite unit codespell detsecrets shellcheck shelldocs
uname	Linux 106e4b1378df 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.4 / f9bde28
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8355/1/testReport/
Max. process+thread count	582 (vs. ulimit of 5500)
modules	C: . U: .
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8355/1/console
versions	git=2.25.1 maven=3.6.3 shellcheck=0.7.0
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

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[pan3793]

so this backport commit missed it
2a6df7e

+1, thanks @cxzl25