ref(core): Add missing class field deprecations (#10187)

Add some `@deprecated` annotations to already deprecated Span
APIs:

* `Span.toTraceParent()`
* `Span.toContext()`
* `Span.updateWithContext()`
* `Span.getTraceContext()`

Co-authored-by: Francesco Novy <francesco.novy@sentry.io>

packages/core/src/tracing/span.ts

@@ -444,13 +444,17 @@ export class Span implements SpanInterface {
 
   /**
    * @inheritDoc
+   *
+   * @deprecated Use `spanToTraceHeader()` instead.
    */
   public toTraceparent(): string {
     return spanToTraceHeader(this);
   }
 
   /**
    * @inheritDoc
+   *
+   * @deprecated Use `spanToJSON()` or access the fields directly instead.
    */
   public toContext(): SpanContext {
     return dropUndefinedKeys({
@@ -471,6 +475,8 @@ export class Span implements SpanInterface {
 
   /**
    * @inheritDoc
+   *
+   * @deprecated Update the fields directly instead.
    */
   public updateWithContext(spanContext: SpanContext): this {
     // eslint-disable-next-line deprecation/deprecation
@@ -493,6 +499,8 @@ export class Span implements SpanInterface {
 
   /**
    * @inheritDoc
+   *
+   * @deprecated Use `spanToTraceContext()` util function instead.
    */
   public getTraceContext(): TraceContext {
     return spanToTraceContext(this);