fix(OTA): ArduinoOTA, HTTPUpdate build fails with NO_GLOBAL_UPDATE flag

[vortigont]

ArduinoOTA and HTTPUpdate uses hardcoded Update instance to execute update writes which is not created if NO_GLOBAL_UPDATE or NO_GLOBAL_INSTANCES flag is defined.

refactor ArduinoOTA/HTTPUpdate clases to use an UpdateClass instance pointer member, it fixes build error and also allows to use UpdateClass derivatives as update executors.

[github-actions]

	Warnings
⚠️	Some issues found for the commit messages in this PR: the commit message "fix(OTA): ArduinoOTA, HTTPUpdate build fails with NO_GLOBAL_UPDATE flag": scope/component should be lowercase without whitespace, allowed special characters are _ / . , * - . Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 10 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).
⚠️	The source branch "Update_noglobfix" incorrect format: contains uppercase letters. This can cause troubles on case-insensitive file systems (macOS). Please rename your branch.

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[github-actions]

Memory usage test (comparing PR against master branch)

The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.

Memory	FLASH [bytes]		FLASH [%]		RAM [bytes]		RAM [%]
Target	DEC	INC	DEC	INC	DEC	INC	DEC	INC
ESP32C5	💚 -298	0	💚 -0.03	0.00	0	⚠️ +16	0.00	⚠️ +0.03
ESP32P4	0	⚠️ +378	0.00	⚠️ +0.04	0	⚠️ +16	0.00	⚠️ +0.04
ESP32S3	💚 -356	⚠️ +4	💚 -0.04	0.00	0	0	0.00	0.00
ESP32S2	💚 -400	⚠️ +4	💚 -0.04	0.00	0	0	0.00	0.00
ESP32C3	💚 -298	0	💚 -0.03	0.00	0	⚠️ +16	0.00	⚠️ +0.04
ESP32C6	💚 -298	0	💚 -0.03	0.00	0	0	0.00	0.00
ESP32	💚 -364	⚠️ +16	💚 -0.04	0.00	0	0	0.00	0.00

Click to expand the detailed deltas report [usage change in BYTES]

Target	ESP32C5		ESP32P4		ESP32S3		ESP32S2		ESP32C3		ESP32C6		ESP32
Example	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM	FLASH	RAM
libraries/ArduinoOTA/examples/BasicOTA	💚 -12	0	⚠️ +378	0	0	0	0	0	💚 -12	0	💚 -12	0	⚠️ +16	0
libraries/HTTPUpdate/examples/httpUpdate	💚 -282	0	⚠️ +108	0	💚 -356	0	💚 -400	0	💚 -282	0	💚 -282	0	💚 -348	0
libraries/HTTPUpdate/examples/httpUpdateSPIFFS	💚 -298	0	⚠️ +92	0	💚 -352	0	💚 -352	0	💚 -298	0	💚 -298	0	💚 -336	0
libraries/HTTPUpdate/examples/httpUpdateSecure	💚 -298	0	⚠️ +100	0	💚 -356	0	💚 -356	0	💚 -298	0	💚 -298	0	💚 -364	0
libraries/WebServer/examples/HttpAdvancedAuth	💚 -12	0	⚠️ +370	⚠️ +16	0	0	0	0	💚 -12	0	💚 -12	0	⚠️ +16	0
libraries/WebServer/examples/HttpAuthCallback	💚 -12	0	⚠️ +370	⚠️ +16	⚠️ +4	0	⚠️ +4	0	💚 -12	0	💚 -12	0	⚠️ +16	0
libraries/WebServer/examples/HttpAuthCallbackInline	💚 -12	0	⚠️ +370	⚠️ +16	⚠️ +4	0	⚠️ +4	0	💚 -12	0	💚 -12	0	⚠️ +16	0
libraries/WebServer/examples/HttpBasicAuth	💚 -12	0	⚠️ +378	⚠️ +16	0	0	0	0	💚 -12	0	💚 -12	0	⚠️ +16	0
libraries/WebServer/examples/HttpBasicAuthSHA1	💚 -12	0	⚠️ +378	⚠️ +16	0	0	0	0	💚 -12	0	💚 -12	0	⚠️ +16	0
libraries/WebServer/examples/HttpBasicAuthSHA1orBearerToken	💚 -12	⚠️ +16	⚠️ +370	0	0	0	0	0	💚 -12	⚠️ +16	💚 -12	0	⚠️ +16	0

[github-actions]

Test Results

 83 files   83 suites   27m 45s ⏱️
 55 tests  55 ✅ 0 💤 0 ❌
598 runs  598 ✅ 0 💤 0 ❌

Results for commit d45c618.

♻️ This comment has been updated with latest results.