Update to Pico-SDK 2.2.0 release, remove multi-lib LWIP, clean up CMake, clean up P.IO build hardcoded defines (#3049)

* Update to Pico-SDK 2.2.0 release

Doesn't seem to have many additions since the develop branch we were using,
but this one is nice and official and tagged.

* Add LIB_PICO_MULTICORE to libpico build
Fixes #3058

* Clean up some unused param warnings

* Fix olimex XL/XXL RP2350A redefinition

* Clean up SDK defines in IDE builds

* Build LWIP at app compile time, no need for multi

We needed about 6 copies of the LWIP/BT library for each CPU when the
LWIP library was built as part of the SDK libpico.

Remove LWIP from the SDK builds and replace it with the actual LWIP
source (linked via `#include`) so we can adjust for IPv4/IPv^/32K/16K
at runtime.  Shrinks download size of a release significantly.

Still need separate LWIP-BT library because the CYW43 driver is
different when BT is enabled.

Update and clean up the libpico CMakefile and common platform_def.txt

Link to config includes, don't copy, where possible

* Platform.IO build fixes

* Use platform_def files for p.io builds

* Allow for no PIN_LED for board variants

* Update Mozilla CCADB URL in CertStore example

Thanks to @jpoikela for esp8266/Arduino#9264

* Update TZ.h from ESP8266 repo

Use newer script which parses local tzdata files

* Re-enable BOOT2.S compiles in libpico

No actual changes to output boot2 files, but if they ever do update we'll
catch it.

* Update LittleFS to latest release 2.11.1

Author: earlephilhower

boards.txt

@@ -113,6 +113,7 @@ class SemiFSFileImpl : public FileImpl {
     }
 
     bool truncate(uint32_t size) override {
+        (void) size;
         return false; // Not allowed
     }
 
@@ -215,6 +216,7 @@ class SemiFSImpl : public FSImpl {
     }
 
     DirImplPtr openDir(const char* path) override {
+        (void) path;
         // No directories
         return DirImplPtr();
     }
@@ -229,6 +231,7 @@ class SemiFSImpl : public FSImpl {
     }
 
     bool info(FSInfo& info) override {
+        (void) info;
         // Not available
         return false;
     }
@@ -241,11 +244,13 @@ class SemiFSImpl : public FSImpl {
     }
 
     bool mkdir(const char* path) override {
+        (void) path;
         // No mkdir
         return false;
     }
 
     bool rmdir(const char* path) override {
+        (void) path;
         // No rmdir
         return false;
     }
@@ -271,6 +276,7 @@ class SemiFSImpl : public FSImpl {
     }
 
     bool setConfig(const FSConfig &cfg) override {
+        (void) cfg;
         return true;
     }